From the lab to full-scale SBR operation: treating high strength and variable industrial wastewaters

2001 ◽  
Vol 43 (3) ◽  
pp. 347-354 ◽  
Author(s):  
T. G. Flapper ◽  
N. J. Ashbolt ◽  
A. T. Lee ◽  
M. O'Neill
Keyword(s):  
Treatment Plant ◽  
High Strength ◽  
Full Scale ◽  
Design Criteria ◽  
Laboratory Studies ◽  
Effluent Quality ◽  
Industrial Wastewaters ◽  
Treatment Processes ◽  
Complete Treatment ◽  
Commercial Opportunity

This paper describes the path taken from client objectives through laboratory studies and detailed design to full-scale SBR operation and current research. Conventional municipal design principles have often been used to develop treatment processes for industrial wastewaters. The use of scientific trials to test design criteria offers the client a “tailor made” design fit for their particular wastewater character. In this project, a waste management company wished to upgrade their physical-chemical treatment plant to incorporate a biological reactor for treating a range of industrial wastewaters. Laboratory-scale trials were undertaken to determine appropriate design criteria for a full-scale biological process. These laboratory studies indicated that conventional design criteria were not appropriate and that a SBR configuration was optimal compared with an IDAR configuration. It was also found that a novel fungal:bacterial mixed liquor consortium developed, resulting in good effluent quality and settling properties. The treatment plant was able to be constructed and operational within a tight timeframe and budget, allowing the client to take advantage of a commercial opportunity. The plant has been operating since 1997 and meets its discharge conditions. By combining scientific studies with engineering principles, the end-user obtained a complete treatment plant to meet their specific needs. A further benefit of the laboratory trials is current research into the development of a fungal:bacterial SBR to treat industrial wastewaters. This offers ongoing knowledge to the operational full-scale SBR.

Semicentralized greywater and blackwater treatment for fast growing cities: how uncertain influent characteristics might affect the treatment processes

2017 ◽  
Vol 75 (7) ◽  
pp. 1722-1731 ◽  
Author(s):  
J. Tolksdorf ◽  
P. Cornel
Keyword(s):  
Treatment Plant ◽  
Oxygen Demand ◽  
Flexible Design ◽  
Model Calculations ◽  
Effluent Quality ◽  
Fast Growing ◽  
Treatment Processes ◽  
Reference Plant ◽  
Design Values ◽  
Pr China

The SEMIZENTRAL infrastructure approach has been developed for fast growing cities, to meet their challenges regarding water supply as well as biowaste and wastewater (WW) treatment. The world's first full-scale SEMIZENTRAL Resource Recovery reference plant has been implemented in Qingdao (PR China). Greywater (GW) and blackwater (BW) are collected and treated separately. Measurement of influent concentrations revealed significant differences, compared with the design values. Values from the literature for GW and BW characteristics vary more markedly than for municipal WW; recommended design values are still lacking. Moreover, cross-connections between GW and BW can influence the influent characteristics considerably. Consequences for the design of GW and BW treatment are evaluated for boundary conditions, which require high effluent quality for both treatment modules. Model calculations illustrate the significant influence of uncertain WW characteristics on the required aeration basin volume and oxygen demand for GW and BW treatment; however, uncertainties are considerably reduced for the combination of these modules. Thus, a flexible design of the treatment plant is required. A possible concept for such a design is presented.

Full-scale on-line assessment of toxic wastewaters causing change in biodegradation model structure and parameters

1996 ◽  
Vol 33 (2) ◽  
pp. 163-175 ◽  
Author(s):  
Peter A. Vanrolleghem ◽  
Zaide Kong ◽  
Filip Coen
Keyword(s):  
Treatment Plant ◽  
Full Scale ◽  
Plant Performance ◽  
Model Structure ◽  
Concomitant Increase ◽  
Effluent Quality ◽  
On Line ◽  
Receiving Waters ◽  
Autotrophic Activity ◽  
Wastewater Samples

Detecting wastewater toxicity in due time is essential for protection of a sewage works and the receiving waters. A respirometric method is presented that performs short batch experiments, so-called In-Sensor-Experiments for toxicity detection. Two types of wastewater samples can be added to the reactor in the device: either the potentially toxic wastewater entering the plant, or, a defined mixture of acetate and ammonia. From the latter experiments models are identified that describe the heterotrophic and autotrophic activity of the sludge. Since these ‘calibration’ experiments are alternated with experiments in which wastewater is injected, the effect of the wastewater on the sludge can be quantified unequivocally. Full-scale toxicity detection (and the corresponding effluent quality) results are reported for a plant treating a mixture of hospital and municipal wastewaters. The respirometer was installed at the influent line of the plant. It was evaluated during a 6-month period for its on-line toxicity detection capacity. Both deliberate and accidental intoxications were recorded and compared with off-line toxicity measurements. Inhibitory wastewaters affected the nitrification activity of the sludge. This was confirmed by the concomitant increase in NH4+ discharge of the treatment plant. To evaluate the efficiency of control actions, the deliberate addition of toxicant was interrupted at the time a toxicity alarm was triggered by the respirometer. It was observed that plant performance then remained unaffected for all monitored criteria.

Rain events and their effect on effluent quality studied at a full scale activated sludge treatment plant

2006 ◽  
Vol 54 (10) ◽  
pp. 201-208 ◽  
Author(s):  
B.-M. Wilén ◽  
D. Lumley ◽  
A. Mattsson ◽  
T. Mino
Keyword(s):  
Activated Sludge ◽  
Laboratory Data ◽  
Treatment Plant ◽  
Full Scale ◽  
Plant Performance ◽  
Particle Removal ◽  
Effluent Quality ◽  
Trickling Filters ◽  
Rain Events ◽  
The Impact

The effect of rain events on effluent quality dynamics was studied at a full scale activated sludge wastewater treatment plant which has a process solution incorporating pre-denitrification in activated sludge with post-nitrification in trickling filters. The incoming wastewater flow varies significantly due to a combined sewer system. Changed flow conditions have an impact on the whole treatment process since the recirculation to the trickling filters is set by the hydraulic limitations of the secondary settlers. Apart from causing different hydraulic conditions in the plant, increased flow due to rain or snow-melting, changes the properties of the incoming wastewater which affects process performance and effluent quality, especially the particle removal efficiency. A comprehensive set of on-line and laboratory data were collected and analysed to assess the impact of rain events on the plant performance.

scholarly journals Performance of UASB Post Treatment Technologies for Sewage Treatment in Surat City

2019 ◽  
Vol 35 (4) ◽  
pp. 1352-1359
Author(s):  
Nimeshchandra Vasanji Vashi ◽  
Navinchandra Champaklal Shah ◽  
Kishor Ratilal Desai
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Full Scale ◽  
Post Treatment ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Treatment Processes ◽  
Treated Sewage

Upflow Anaerobic Sludge Blanket (UASB) process is a popular process for treatment of sewage in India due to its low power requirement. However, UASB system has many limitations in terms of removal of carbon, nutrients and pathogens. This requires post treatment after UASB to meet the treated water quality standards. Current treatment processes adopted for the post-treatment of anaerobically treated sewage, especially the full-scale UASB reactors in Surat, India are presented. Two full scale treatment plants with different UASB post treatment processes viz., Extended Aeration and Moving Bed Biological Reactor (MBBR) are selected for studies. A pilot study was carried out in a full scale Sewage Treatment Plant (STP) to study the performance of Sequential Batch Reactor (SBR) for treatment of UASB treated sewage and the results are reported for period of Three months. Inlet and outlet parameters such as Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), etc. for post UASB biological process are presented. The performance of the SBR process was observed to be better among all the processes studied.

Nightsoil treatment plant converted into a sequencing batch reactor to improve removal of pollutants and nutrients

1997 ◽  
Vol 35 (1) ◽  
pp. 233-240 ◽  
Author(s):  
E. Choi ◽  
S.-W. Oa ◽  
J.-J. Lee
Keyword(s):  
Nutrient Removal ◽  
Energy Savings ◽  
Batch Reactor ◽  
Treatment Plant ◽  
High Strength ◽  
Chemical Precipitation ◽  
Winter Period ◽  
Capital Investments ◽  
Effluent Quality ◽  
Heat Released

An existing 2 stage aerobic nightsoil treatment plant (25m3/d capacity) was converted (modified) from a conventional continuous flow system to a single stage SBR unit for nutrient removal. 10 months study indicated organic and nutrient removal drastically improved. Heat released from decomposition of high strength influent kept liquid temperature above 15 °C for a complete nitrification even during winter period. Nutrient removal efficiencies were found to be greatly affected by pH changes due to denitrification and nitrification. Increased pH due to denitrification stimulated chemical precipitation as struvite and hydroxyapatite. In contrast, decreased pH in aerobic stage due to nitrification dissolved the previously formed precipitates resulting in increased of PO4-P. Sludge fractionation indicated phosphorus was removed about 42 % chemically and about 36 % biologically. Piping changes and timer installations were the major capital investments in this modification, but energy savings were estimated to be about 40 to 53 %. Additional savings in O&M could be expected from the improved effluent quality.

scholarly journals Performance of a UASB Effluent Treatment Plant Treating Malt Ingredient Manufacturing Wastewater

2017 ◽  
Vol 6 (2) ◽  
pp. 198 ◽  
Author(s):  
Ryland Cairns ◽  
Paul Mead
Keyword(s):  
Treatment Plant ◽  
High Strength ◽  
Cost Effective ◽  
Full Scale ◽  
Effluent Treatment ◽  
Operational Performance ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Effluent Treatment Plant ◽  
Wide Range

Anaerobic Digestion has gained popularity in recent years due to its significant contribution towards achieving waste management and renewable energy targets. One particular technology that has been widely used in the treatment of high strength organic wastewaters across a wide range of industries is upflow anaerobic sludge blankets (UASBs). A malt ingredients manufacturing factory has successfully applied this technology as a cost effective way to treat their high strength effluent, however unlike other industries there is a lack of research regarding the wastewater characterisation or UASB performance at either lab or full scale. This paper aims to address this gap in knowledge and provide information on both the wastewater composition and on the ability of a full-scale mesophilic UASB to treat it over a period of 638 days. Analysis of the wastewater revealed that the manufacture of malt ingredients produces a high strength effluent, which fits within the realms of previously documented wastewaters despite not sharing a similar characterisation profile. Mesophilic UASB has been show to be an effective and robust technology option for the treatment of this type of wastewater displaying steady operational performance even when conditions were in excess of the design limit. Due to the robust operational performance of the plant the main factor limiting total methane production was shown to be the organic loading rate. 

scholarly journals Pesticide removal through wastewater and advanced treatment: full-scale sampling and bench-scale testing

2017 ◽  
Vol 77 (3) ◽  
pp. 739-747 ◽  
Author(s):  
J. D. Kenny ◽  
B. D. Webber ◽  
E. W. Howe ◽  
R. B. Holden
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Suspended Solids ◽  
Treatment Plant ◽  
Full Scale ◽  
Secondary Effluent ◽  
Physical Treatment ◽  
Bench Scale ◽  
Pesticide Removal ◽  
Treatment Processes

Abstract Dieldrin and DDx removal through wastewater treatment, ozonation, and microfiltration was assessed for a water reuse project for groundwater replenishment in Monterey, California, USA. Full-scale sampling was conducted at the wastewater treatment plant, and physical wastewater treatment processes, ozonation, and microfiltration were tested at the bench scale. Removals observed through wastewater treatment, ozonation, and microfiltration were 84%, 44% to 63%, and 97% to 98%, respectively, for dieldrin, and 93%, 36% to 48%, and 92% to 94% for DDx. These were sufficient to meet California Ocean Plan water quality objectives after wastewater treatment alone. Levels in the secondary effluent, ahead of ozonation, microfiltration, reverse osmosis and advanced oxidation in the advanced water purification facility, met drinking water standards. Removal of dieldrin and DDx through wastewater treatment occurred by physical treatment processes; removal through the full-scale wastewater treatment plant, which included biological and physical treatment processes, matched removal through the physical bench-scale wastewater treatment processes. Dieldrin and DDx removal correlated with removal of volatile suspended solids, suggesting that volatile suspended solids could be used as an indicator for pesticide removal through wastewater treatment. Dieldrin and DDx concentrations were highest in the solids contact process, where biomass is accumulated for carbon removal.

Utilization of activated sludge plants for enhanced treatment of combined sewage

2008 ◽  
Vol 58 (8) ◽  
pp. 1569-1574
Author(s):  
B. Nikolavcic ◽  
K. Svardal ◽  
G. Wandl ◽  
N. Günther ◽  
G. Spatzierer
Keyword(s):  
Particulate Matter ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Primary Treatment ◽  
Full Scale ◽  
Storm Water ◽  
Effluent Quality ◽  
High Extent ◽  
Water Conditions

A process is introduced which utilizes secondary clarifiers for the treatment of combined sewage. Under storm water conditions, surplus sewage bypasses the aeration tanks after primary treatment and is directly introduced into the secondary clarifiers. The hydraulic capacity of existing activated sludge plants can be increased without additional tank volume. Particulate matter as well as dissolved compounds are removed to a high extent. Investigations on a full scale treatment plant (100,000 p.e.) show that the effluent quality is comparable with full biological treatment, even if the hydraulic loading is increased by 50%.

Total nitrogen removal in two-step biofiltration

2000 ◽  
Vol 41 (4-5) ◽  
pp. 65-68 ◽  
Author(s):  
R. Pujol ◽  
S. Tarallo
Keyword(s):  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Full Scale ◽  
Carbon And Nitrogen ◽  
Loading Rates ◽  
Complete Treatment ◽  
In Series ◽  
Total Nitrogen Removal ◽  
One Year

A one-year study was carried out on two semi-industrial submerged up-flow biofilters - a pre-denitrification (pre-DN) step followed by a nitrifying (N) step, designed to treat the primary settled municipal wastewater of a full scale plant for both carbon and nitrogen removal. Performances of the pre-DN step have been investigated showing high removal denitrifying capacities – 1 to 1.2 kg NO3−–N removed per m3 of reactor per day–, obtained with high TSS and carbon loading rates, at a water velocity up to 21.5 m3/ m2.h. The complete treatment plant – primary settlement + pre-DN/N loop – has demonstrated a nitrogen removal efficiency ranging from 70% without any additional carbon, up to 85% with methanol. COD and TSS removal rates were 91% and 97% respectively. The above results show that two submerged biofilters in series form a treatment line suitable for nitrogen removal. This technical choice leads to very compact full scale plants such as Ahlen WWTP (Germany, 85 000 PE).

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